Process of Land Use/ Land Cover Change in the Oasis of Arid Region

  • 1. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011,China;
    2. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101,China

Received date: 2002-09-10

  Revised date: 2002-11-25

  Online published: 2003-01-25

Supported by

Project of Knowledge Innovation of CAS, No. KZCX3-SW-327; The National Key Basic Research Project of China, No. G1999043507 & G1999043508


Using remote sensing imagery data of 1978, 1987 and 1998, and taking the typical oasis in alluvial-diluvial/fan-alluvial-plain type in Sangong River Watershed as study area, the process and trend of oasis LUCC are analyzed by applying the methods of remote sensing (RS), geographic information system (GIS) and statistics. The main results of oasis LUCC in Sangong River Watershed are as follows.(1) RS and GIS are powerful techniques and methods in capturing oasis LUCC data and analyzing its spatial change.(2) Establishing mathematical models in the range, speed, regional differences and trend index of LUCC, especially the model of LUCC trend and state, the process and trend of oasis LUCC can be deeply studied, including bi-direction process, single-direction process, positive and negative process, rising and falling trend, etc. these models are applied to oasis of Sangong River Watershed and satisfactory effects have been obtained. (3) The LUCC in oasis has had a slow tendency since 1978 and obviously shows temporal and spatial differences. In the period of 1978-1987, the index of oasis LUCC trend and state was 0.58, which indicates that oasis LUCC presented non-equilibrium state with the transition process in single direction and evident regional differences: the state of LUCC was quasi-balanced in the upper part of oasis, but non-balanced in the middle and lower parts of oasis. In the period of 1987-1998, the index of oasis LUCC trend and state was 0.3, which indicates that the state of oasis LUCC was quasi-balanced with the transition process in bi-direction and showed the different regional changes compared with the period during 1987-1998: the state of LUCC was non-balanced in the upper and middle parts of oasis, but balanced in the lower part of oasis. (4) No matter how quantitative change or spatial change, the speed of LUCC in the middle part of oasis is the biggest among its parts and more than that of LUCC of entire oasis; the next is the lower part and the smallest is the upper part, whose speeds are all less than that of LUCC of entire oasis.

Cite this article

LUO Geping, ZHOU Chenghu, CHEN Xi . Process of Land Use/ Land Cover Change in the Oasis of Arid Region[J]. Acta Geographica Sinica, 2003 , 58(1) : 63 -72 . DOI: 10.11821/xb200301008


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